MAINT remove unneeded import (scikit-learn#7465)

themrmax · jnothman · commit 8a7948aa9915 · 2016-09-22T11:16:36.000+10:00
diff --git a/doc/modules/tree.rst b/doc/modules/tree.rst
@@ -143,7 +143,6 @@ supported file type): ``dot -Tpdf iris.dot -o iris.pdf``.
 Alternatively, if we have Python module ``pydotplus`` installed, we can generate
 a PDF file (or any other supported file type) directly in Python::
 
-    >>> from sklearn.externals.six import StringIO  # doctest: +SKIP
     >>> import pydotplus # doctest: +SKIP
     >>> dot_data = tree.export_graphviz(clf, out_file=None) # doctest: +SKIP
     >>> graph = pydotplus.graph_from_dot_data(dot_data) # doctest: +SKIP
@@ -155,7 +154,7 @@ using explicit variable and class names if desired. IPython notebooks can also
 render these plots inline using the `Image()` function::
 
     >>> from IPython.display import Image  # doctest: +SKIP
-    >>> dot_data = tree.export_graphviz(clf,  out_file=None, # doctest: +SKIP
+    >>> dot_data = tree.export_graphviz(clf, out_file=None, # doctest: +SKIP
                              feature_names=iris.feature_names,  # doctest: +SKIP
                              class_names=iris.target_names,  # doctest: +SKIP
                              filled=True, rounded=True,  # doctest: +SKIP
